ESP8266-DevKit- Development Board

• ESP8266-DevKitC is a small-sized ESP8266-based development board produced by
  Espressif.
• All of the I/O pins of the module are broken out to the female pin headers on
  both sides of the board for easy interfacing. Developers can connect these pins to
  peripherals as needed.
• On board wifi module is WROOM-02D.
• On board resources: 5V to 3.3V LDO, Dial Switch (for Auto Download and Flow Control), USB to UART Bridge, Micro USB Port, EN Reset Button, I/O Connector, etc.